CN109581465A - A kind of tritium gas standard source activity measurement device, methods and applications - Google Patents
A kind of tritium gas standard source activity measurement device, methods and applications Download PDFInfo
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- CN109581465A CN109581465A CN201811631656.8A CN201811631656A CN109581465A CN 109581465 A CN109581465 A CN 109581465A CN 201811631656 A CN201811631656 A CN 201811631656A CN 109581465 A CN109581465 A CN 109581465A
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- Prior art keywords
- gas
- tritium
- standard source
- mixing chamber
- activity
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/17—Circuit arrangements not adapted to a particular type of detector
- G01T1/178—Circuit arrangements not adapted to a particular type of detector for measuring specific activity in the presence of other radioactive substances, e.g. natural, in the air or in liquids such as rain water
Abstract
This application provides a kind of tritium gas standard source activity measurement devices, methods and applications.Described device include: tritium gas standard source, working gas tank, with the tritium gas standard source and the tank connected mixing chamber of the working gas, the activity measurement component for connecting with the mixing chamber and being used to measure the tritium gas activity in the mixing chamber by working gas mixing and connect and is used for the vent gas treatment component that the tritium gas of measurement is completed in processing with the activity measurement component.Realization measures the activity of tritium gas standard source.
Description
Technical field
This application involves a kind of tritium gas standard source activity measurement devices, methods and applications.
Background technique
Tritium is the radioactive isotope of hydrogen, and maximum decay can be the pure β emitter of 18.6keV, half-life period 12.35a.?
Line measurement relates to the tritium concentration in tritium place, has for the radiation safety of staff, workshop and the public important
Meaning.For tritium in air real-time monitoring firstly the need of determining tritium gas standard source preparation method and valued methods, it is ensured that tritium gas
The validity in activity magnitude source.
For the preparation method of tritium gas standard source, number of patent application provides one for 2017105187747 patent document
The device for formulating and method of kind tritium gas Standard Gases, this method is diluted by high-purity tritium gas, and is dispensed under the conditions of equipressure, is prepared
Uniformity and the tritium gas standard source having good stability.
However in order to guarantee the accuracy of subsequent tritium monitoring magnitude, it is also necessary to carry out activity to the tritium gas standard source of preparation
Definite value solves the demand of tracing to the source during tritium transmission of quantity value.It is fixed to the tritium gas standard source progress activity of preparation to not currently exist
The method or device of value, therefore the calibration for the real-time monitoring instrument of tritium in subsequent air can not be implemented.
Summary of the invention
(1) technical problems to be solved
The method or device for carrying out activity definite value to the tritium gas standard source of preparation are not currently existed, therefore can not be implemented
Calibration for the real-time monitoring instrument of tritium in subsequent air.
(2) technical solution
This application provides a kind of tritium gas standard source activity measurement device, described device includes: tritium gas standard source, work gas
Body tank, with the tritium gas standard source and the tank connected mixing chamber of the working gas, connect with the mixing chamber and be used to measure
Pass through the activity measurement component of the tritium gas activity of working gas mixing in the mixing chamber and connects with the activity measurement component
Connect and be used to handle the vent gas treatment component for the tritium gas that measurement is completed.
Optionally, the working gas in the working gas tank is the mixed gas of 90% argon gas and 10% methane.
Optionally, the activity measurement component includes three proportional counters being connect with the mixing chamber by valve,
And the electronic analysis component being connect with three proportional counters；The effective volume of three proportional counters is respectively
50mL、100mL、150mL。
Optionally, the vent gas treatment component includes the tail gas storage tank connecting with the activity measurement component, and described
Tail gas stores tank connected catalytic oxidizer.
Optionally, described device further includes the tritium gas detector connecting with the catalytic oxidizer.
Optionally, described device further includes nitrogen gas tank and vacuum pump, and the nitrogen gas tank connect with the mixing chamber and is used in combination
In flushing described device.
Optionally, the mixing chamber includes pressure gauge, vacuum meter and thermometer.
On the other hand the application provides a kind of tritium gas standard source activity measurement method, which comprises by tritium gas mark
Quasi- source radiation activity measurement vacuumizes, and the tritium gas in the tritium gas standard source of preset vol is passed through mixing chamber；It will be in working gas tank
The mixed gas of 90% argon gas and 10% methane is passed through the mixing chamber to preset pressure；Valve is opened, three direct ratio meters are passed through
Number device measures tritium gas activity in mixing chamber, and tritium gas activity result is stored in electronic analysis component；After will test
Gas is passed through in tail gas storage tank in mixing chamber, and the gas in tail gas storage tank is carried out at catalysis oxidation by catalytic oxidizer
Reason；Gas after catalytic oxidizer carries out catalytic oxidation treatment is passed through tritium gas detector to detect, is urged described in judgement
Whether tritium level reaches default discharge value in gas after changing oxidation processes, if so, being discharged, if it is not, being passed through again
In tail gas storage tank, catalytic oxidation treatment is carried out again by catalytic oxidizer.
Optionally, tritium gas standard source activity measurement is vacuumized before, the method also includes: by nitrogen gas tank
Nitrogen rinse tritium gas standard source activity measurement device.
The application another further aspect provides a kind of application of devices described above in the calibration of tritium gas detecting instrument.
(3) beneficial effect
The working principle of the application device is by tritium gas standard source 1 and working gas tank 2 by the tritium gas mark of preset vol
Quasi- source and working gas, which are delivered in mixing chamber, to be mixed, and tritium gas standard source herein refers to activity accurate definite value
Tritium gas is as standard source.The tritium gas of default activity is produced, activity survey is then carried out to the tritium gas by activity measurement component 4
Amount, is handled tritium gas by vent gas treatment component 5 after being measured.It solves due to not currently existing the tritium to preparation
Gas standard source carries out the method or device of activity definite value, can not implement the school for the real-time monitoring instrument of tritium in subsequent air
Quasi- problem.After being measured by the device of the embodiment of the present application to the activity of tritium gas standard source, it can be used in
Calibration to tritium monitor device.
Detailed description of the invention
Fig. 1 is tritium gas standard source activity measurement schematic device provided by the embodiments of the present application,
Wherein, appended drawing reference are as follows:
1, tritium gas standard source；2, working gas tank；3, mixing chamber；4, activity measurement component；5, vent gas treatment component；6, tritium
Gas detector；7, nitrogen gas tank；
401, valve；402, three proportional counters；403, electronic analysis component；
501, tail gas storage tank；502, catalytic oxidizer.
Specific embodiment
Hereinafter, will be described with reference to the accompanying drawings embodiments herein.However, it should be understood that these descriptions are only exemplary
, and it is not intended to limit scope of the present application.In the following detailed description, to elaborate many specific thin convenient for explaining
Section is to provide the comprehensive understanding to the embodiment of the present application.It may be evident, however, that one or more embodiments are not having these specific thin
It can also be carried out in the case where section.In addition, in the following description, descriptions of well-known structures and technologies are omitted, to avoid
Unnecessarily obscure the concept of the application.
Term as used herein is not intended to limit the application just for the sake of description specific embodiment.It uses herein
The terms "include", "comprise" etc. show the presence of the feature, step, operation and/or component, but it is not excluded that in the presence of
Or add other one or more features, step, operation or component.
The embodiment of the present application provides a kind of tritium gas standard source activity measurement device, and referring to Fig. 1, described device includes:
Tritium gas standard source 1, working gas tank 2, the mixing being connect with the tritium gas standard source 1 and the working gas tank 2
Room 3 is connect and for measuring the activity for passing through the tritium gas activity of working gas mixing in the mixing chamber 3 with the mixing chamber 3
Measurement component 4 and the vent gas treatment component for connecting and be used to handle the tritium gas that measurement is completed with the activity measurement component 4
5。
The working principle of the device is by tritium gas standard source 1 and working gas tank 2 by the tritium gas standard source of preset vol
And working gas is delivered in mixing chamber and is mixed, tritium gas standard source herein refers to the tritium gas of activity accurate definite value
As standard source.The tritium gas of default activity is produced, activity measurement is then carried out to the tritium gas by activity measurement component 4, is surveyed
Tritium gas is handled by vent gas treatment component 5 after the completion of amount.It solves due to not currently existing the tritium gas mark to preparation
Quasi- source carries out the method or device of activity definite value, can not implement for the calibration of the real-time monitoring instrument of tritium in subsequent air
Problem.After being measured by the device of the embodiment of the present application to the activity of tritium gas standard source, it can be used in tritium
The calibration of monitoring instrument.In other words, it is measured by activity of the device of the embodiment of the present application to tritium gas standard source, forms one
A effective measurement facility of standard, for measuring whether other tritium monitor devices can accurately detect tritium gas.
Wherein, the tritium gas standard source 1 can be can-like, and the working gas in the working gas tank 2 is 90% argon gas
With the mixed gas of 10% methane, the volume of mixing chamber 3 illustratively can be 10L.Due to the tritium gas standard source radiation activity of configuration
Concentration is (104~106) Bq/L, and the optimum range of counter method measurement tritium activity is (103~104) Bq/L, therefore
It needs to be diluted tritium gas standard source before activity measurement.The mixing chamber 3 includes pressure gauge, vacuum meter, thermometer, tritium gas
The outlet of standard source 1 may include mass flowmenter.Utilize the total amount of the tritium gas of mass flow meter measurement input mixing chamber 3, temperature
Gaseous mixture physical parameter is measured with pressure sensor, the amendment for tritium activity concentration.
The activity measurement component 4 includes passing through three proportional counters 402 that valve 401 is connect with the mixing chamber 3,
And the electronic analysis component 403 being connect with three proportional counters 402；Three proportional counters 402 it is effective
Volume is respectively 50mL, 100mL, 150mL.
Herein, activity is also the rate of disintegration, refers to that sample decays the atomicity fallen within the unit time, i.e., something " effectively
Concentration ".Length compensation method is a kind of absolute method of measurement based on proportional counter measurement radgas activity.Its principle is
The activity of radgas is measured by the proportional counter of different length, is tied with eliminating the factors such as counter end effect to measurement
Fruit bring deviation.The concrete principle of proportional counter measurement tritium gas activity is, in proportional counter in tritium with 90% argon
After the mixing of the mixed gas of gas and 10% methane adds high pressure, generated number of ions is put due to the gas of strong electrical field around anodic wire
It acts on greatly and doubles.This amplification is enough to generate observable charge pulse.Proportional counter output pulse amplitude and initial
Ionization has proportional relation, can be used to count single particle, and determine incident radiation according to the pulse height of output signal
Energy.In addition, the β particle of tritium transmitting is with respect to the particle pair that α particle ionizes under high pressure if using air as working gas
That to be lacked is more, is unfavorable for gaseous state Tritium measurement, and when using the mixed gas of 90% argon gas and 10% methane, measurement effect is then
Preferably.
The vent gas treatment component 5 includes the tail gas storage tank 501 connecting with the activity measurement component 4, with the tail
The catalytic oxidizer 502 and circulating pump that gas storage tank 501 connects.Device further includes connecting with the catalytic oxidizer 502
Tritium gas detector 6.Wherein the volume of tail gas storage tank 501 illustratively can be 30L.The working method of vent gas treatment component 5
Are as follows: pass through circulating pump after the completion of tritium activity measurement for tritium mixed gas and be pumped into tail gas storage tank 501, when the tritium for collecting predetermined amount is mixed
It is pumped into catalytic oxidizer 502 after conjunction gas and converts surabaya for tritium at high temperature, and solidifies by silica gel absorption, by gaseous state
Tritium is converted into solid waste and is handled, and treated gas measures the activity concentration of remaining tritium by tritium monitor,
It is emitted into external environment if meeting emission request, is pumped into tail gas storage tank 501 again if being unsatisfactory for requiring and re-starts and follow
Ring.By vent gas treatment component 5, surabaya is converted by tritium gas and absorbs solidification, convert solid waste for gaseous state tritium
It is handled, is effectively reduced radgas discharge, reduces the harm risk to operator and environment.
Described device further includes nitrogen gas tank 7 and vacuum pump, and the nitrogen gas tank 7 connect with the mixing chamber 3 and for rushing
Wash described device.Whole device is rinsed by the nitrogen in nitrogen gas tank 7 before tritium gas to be passed through to mixing chamber 3 and is vacuumized, it can
Effectively to remove proportional counter, remaining tritium gas in system.
Another embodiment of the application additionally provides a kind of tritium gas standard source activity measurement method, and the method specifically includes
The following steps are realized:
Step 1: tritium gas standard source activity measurement device is rinsed by the nitrogen in nitrogen gas tank 7；By tritium gas standard source radiation activity
Measurement vacuumizes, and is that 2 × 105Bq/L tritium gas is passed through mixing chamber 3 by the activity in the tritium gas standard source 1 of 500mL；Wherein, it is inciting somebody to action
Tritium gas rinses whole device by the nitrogen in nitrogen gas tank 7 before being passed through mixing chamber 3 and vacuumizes, and can effectively remove direct ratio meter
Remaining tritium gas in number device, system.
Step 2: by the mixed gas of 90% argon gas and 10% methane in working gas tank 2 be passed through the mixing chamber 3 to
Pressure is 2atm.
Step 3: valve 401 is opened, tritium gas activity in mixing chamber 3 is measured by three proportional counters 402,
In three proportional counter effective volumes be respectively 50mL, 100mL, 150mL, measuring system total volume is 10.8L, passes through length
Penalty method calculate in proportional counter tritium activity concentration be 7.2 × 103Bq/L, be thus calculated in the tritium gas standard source of configuration
Tritium activity is 1.6 × 105Bq/L, and tritium gas activity result is stored in electronic analysis component 403.
Step 4: will test gas in rear mixing chamber 3 and be passed through in tail gas storage tank 501, by the gas in tail gas storage tank 501
Body carries out catalytic oxidation treatment by catalytic oxidizer 502.
Step 5: the gas after catalytic oxidizer 502 carries out catalytic oxidation treatment being passed through tritium gas detector 6 and is carried out
It detects, whether tritium level reaches default discharge value (background level) in the gas after judging the catalytic oxidation treatment, if so, will
It is discharged, if it is not, being passed through in tail gas storage tank 501 again, is carried out at catalysis oxidation again by catalytic oxidizer 502
Reason.
The further embodiment of the application additionally provides a kind of devices described above in the calibration of tritium gas detecting instrument
Application.
Illustratively, interface can be set after activity measurement component 4, tritium gas detector may be implemented by the interface
The calibration of device.
It will be understood by those skilled in the art that the feature recorded in each embodiment and/or claim of the application can
To carry out multiple combinations or/or combination, even if such combination or combination are not expressly recited in the application.Particularly, exist
In the case where not departing from the application spirit or teaching, the feature recorded in each embodiment and/or claim of the application can
To carry out multiple combinations and/or combination.All these combinations and/or combination each fall within scope of the present application.
Although the application, art technology has shown and described referring to the certain exemplary embodiments of the application
Personnel it should be understood that in the case where the spirit and scope limited without departing substantially from the following claims and their equivalents,
A variety of changes in form and details can be carried out to the application.Therefore, scope of the present application should not necessarily be limited by above-described embodiment,
But should be not only determined by appended claims, also it is defined by the equivalent of appended claims.
Claims (10)
1. a kind of tritium gas standard source activity measurement device, which is characterized in that described device includes:
Tritium gas standard source (1), is connect with the tritium gas standard source (1) and the working gas tank (2) working gas tank (2)
Mixing chamber (3) is connect and for measuring in the mixing chamber (3) by the tritium gas of working gas mixing with the mixing chamber (3)
It the activity measurement component (4) of activity and is connect with the activity measurement component (4) and for handling the tritium gas that measurement is completed
Vent gas treatment component (5).
2. the apparatus according to claim 1, which is characterized in that the working gas in the working gas tank (2) is 90%
The mixed gas of argon gas and 10% methane.
3. the apparatus according to claim 1, which is characterized in that the activity measurement component (4) includes and the mixing chamber
(3) three proportional counters (402) connected by valve (401), and connect with three proportional counters (402)
Electronic analysis component (403)；The effective volume of three proportional counters (402) is respectively 50mL, 100mL, 150mL.
4. the apparatus according to claim 1, which is characterized in that the vent gas treatment component (5) includes surveying with the activity
Measure the tail gas storage tank (501) of component (4) connection, the catalytic oxidizer (502) connecting with the tail gas storage tank (501).
5. the apparatus according to claim 1, which is characterized in that described device further includes and the catalytic oxidizer (502)
The tritium gas detector (6) of connection.
6. the apparatus according to claim 1, which is characterized in that described device further includes nitrogen gas tank (7) and vacuum pump, institute
Nitrogen gas tank (7) is stated to connect with the mixing chamber (3) and for rinsing described device.
7. the apparatus according to claim 1, which is characterized in that the mixing chamber (3) includes pressure gauge, vacuum meter and temperature
Meter.
8. a kind of tritium gas standard source activity measurement method, which is characterized in that the described method includes:
Tritium gas standard source activity measurement is vacuumized, the tritium gas in the tritium gas standard source (1) of preset vol is passed through mixing chamber
(3)；
The mixed gas of 90% argon gas and 10% methane in working gas tank (2) is passed through the mixing chamber (3) to default pressure
Power；
It opens valve (401), tritium gas activity in mixing chamber (3) is measured by three proportional counters (402), and by tritium
Gas activity result is stored in electronic analysis component (403)；
It will test gas in rear mixing chamber (3) to be passed through in tail gas storage tank (501), the gas in tail gas storage tank (501) is logical
It crosses catalytic oxidizer (502) and carries out catalytic oxidation treatment；
Gas after catalytic oxidizer (502) carry out catalytic oxidation treatment is passed through tritium gas detector (6) to detect, is sentenced
Whether tritium level reaches default discharge value in gas after the catalytic oxidation treatment of breaking, if so, discharged, if it is not,
Again it is passed through in tail gas storage tank (501), carries out catalytic oxidation treatment again by catalytic oxidizer (502).
9. according to the method described in claim 8, it is characterized in that, tritium gas standard source activity measurement is vacuumized before,
The method also includes:
Tritium gas standard source activity measurement device is rinsed by the nitrogen in nitrogen gas tank (7).
10. a kind of application of device according to any one of claims 1 to 7 in the calibration of tritium gas detecting instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811631656.8A CN109581465A (en) | 2018-12-28 | 2018-12-28 | A kind of tritium gas standard source activity measurement device, methods and applications |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811631656.8A CN109581465A (en) | 2018-12-28 | 2018-12-28 | A kind of tritium gas standard source activity measurement device, methods and applications |
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| CN201811631656.8A Pending CN109581465A (en) | 2018-12-28 | 2018-12-28 | A kind of tritium gas standard source activity measurement device, methods and applications |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111879793A (en) * | 2020-06-15 | 2020-11-03 | 中国原子能科学研究院 | Tritium gas adsorption performance experimental device and method thereof |
| CN113253328A (en) * | 2021-06-29 | 2021-08-13 | 中国核动力研究设计院 | On-line measuring system and method for medium and low concentration tritium |
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| DE4210832C1 (en) * | 1992-04-01 | 1993-07-22 | Siemens Ag, 8000 Muenchen, De | Determn. of tritium content in radioactive sample opt. contg. other radio-nuclides - by holding sample in container permeable only to hydrogen isotope ions, heating and supplying with inert gas |
| KR20120038186A (en) * | 2010-10-13 | 2012-04-23 | 한국수력원자력 주식회사 | An automatic cocktail manufacturing device and it control technology |
| CN103091696A (en) * | 2012-09-26 | 2013-05-08 | 成都理工大学 | Gas state tritium activity measuring method |
| CN202975340U (en) * | 2012-09-26 | 2013-06-05 | 成都理工大学 | Gaseous tritium activity measuring device |
| CN107274950A (en) * | 2017-06-22 | 2017-10-20 | 中广核久源（成都）科技有限公司 | It is a kind of to be used to handle the purifier that neutron imaging instrument produces tritium gas |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE4210832C1 (en) * | 1992-04-01 | 1993-07-22 | Siemens Ag, 8000 Muenchen, De | Determn. of tritium content in radioactive sample opt. contg. other radio-nuclides - by holding sample in container permeable only to hydrogen isotope ions, heating and supplying with inert gas |
| KR20120038186A (en) * | 2010-10-13 | 2012-04-23 | 한국수력원자력 주식회사 | An automatic cocktail manufacturing device and it control technology |
| CN103091696A (en) * | 2012-09-26 | 2013-05-08 | 成都理工大学 | Gas state tritium activity measuring method |
| CN202975340U (en) * | 2012-09-26 | 2013-06-05 | 成都理工大学 | Gaseous tritium activity measuring device |
| CN107274950A (en) * | 2017-06-22 | 2017-10-20 | 中广核久源（成都）科技有限公司 | It is a kind of to be used to handle the purifier that neutron imaging instrument produces tritium gas |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111879793A (en) * | 2020-06-15 | 2020-11-03 | 中国原子能科学研究院 | Tritium gas adsorption performance experimental device and method thereof |
| CN113253328A (en) * | 2021-06-29 | 2021-08-13 | 中国核动力研究设计院 | On-line measuring system and method for medium and low concentration tritium |
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Application publication date: 20190405 |